# def add(a,b):
#     result = a+b
#     return result
# #
# # print(add(10,40))
#
#
# name = 'lk'
# def demo():
#     res = 'mo'
# demo()
# print(name)

import demo     # 导入模块
demo.add(1,4)
demo.sub(2,1)

from demo import add    # 导入包
add(1,4)

